Wednesday, October 29, 2008

Earth's Atmosphere

Earth's atmosphere make Earth different from other planets and moons without an atmosphere for in many ways. The atmosphere is very important for Earth to maintain a temperature suitable for life. Without an atmosphere the Earth would get very hot when the sun hits it and then very cold when the sun goes away. A part of the atmosphere called the ozone layer blocks harmful UV(ultra-violet) radiation. Without an atmosphere there would be no air, and so no oxygen and other gases that living things need to survive. One last difference is that without an atmosphere, all meteors aimed at the moon strike it. When a meteor enters Earth's atmosphere, it usually burns up before reaching the earth. Even those who do hit, their craters are eroded by the weather, which moons and planets that don't have an atmosphere do not have. Earth's atmosphere causes many differences between Earth and other planets and also make it possible to be inhabited by life.

No comments: